Here we see Gebhardt perform his usual statics shots followed by a high-speed performance test with a fixed camera shot of the instrument cluster.

Sport Auto test drive editor Christian Gebhardt has sent us his latest video for the 2013 Alpina B6 Biturbo. Here we see Gebhardt perform his usual statics shots followed by a high-speed performance test with a fixed camera shot of the instrument cluster.

Starting from stand still, the B6 hits a top speed of 208 mph (334 km/h) according to the speedometer, however, Gebhardt tells us his GPS unit logged 204 mph (328 km/h). This top speed is significantly higher than the standard BMW M6 equipped with a M Driver's Package which tops at 189 mph (305 km/h), and is also higher than Alpina's own specification of 199 mph (320 km/h).

Mechanically, the Alpina B6 Biturbo differs from the M6 with a rebuilt 4.4-liter twin-turbo V8 engine using Mahle pistons, a high-performance cooling system, a revised eight-speed automatic transmission and a titanium exhaust system from Akrapovic. The B6 Biturbo Coupe ironically develops less power with 533 hp (397 kW / 540 PS) but more torque of 516 lb-ft (700 Nm) compared to the M6 with 552 hp (412 kW / 560 PS) and 502 lb-ft (680 Nm). The B6 Biturbo runs 0 to 62 mph (100 km/h) in 4.4 seconds while the M6 in 4.2 seconds.